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/*
Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "testutil.hpp"
// Issue 566 describes a problem in libzmq v4.0.0 where a dealer to router
// connection would fail randomly. The test works when the two sockets are
// on the same context, and failed when they were on separate contexts.
// Fixed by https://github.com/zeromq/libzmq/commit/be25cf.
int main (void)
{
setup_test_environment();
void *ctx1 = zmq_ctx_new ();
assert (ctx1);
void *ctx2 = zmq_ctx_new ();
assert (ctx2);
void *router = zmq_socket (ctx1, ZMQ_ROUTER);
int on = 1;
int rc = zmq_setsockopt (router, ZMQ_ROUTER_MANDATORY, &on, sizeof (on));
assert (rc == 0);
rc = zmq_bind (router, "tcp://127.0.0.1:5555");
assert (rc != -1);
// Repeat often enough to be sure this works as it should
for (int cycle = 0; cycle < 100; cycle++) {
// Create dealer with unique explicit identity
// We assume the router learns this out-of-band
void *dealer = zmq_socket (ctx2, ZMQ_DEALER);
char identity [10];
sprintf (identity, "%09d", cycle);
rc = zmq_setsockopt (dealer, ZMQ_IDENTITY, identity, 10);
assert (rc == 0);
int rcvtimeo = 1000;
rc = zmq_setsockopt (dealer, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int));
assert (rc == 0);
rc = zmq_connect (dealer, "tcp://127.0.0.1:5555");
assert (rc == 0);
// Router will try to send to dealer, at short intervals.
// It typically takes 2-5 msec for the connection to establish
// on a loopback interface, but we'll allow up to one second
// before failing the test (e.g. for running on a debugger or
// a very slow system).
for (int attempt = 0; attempt < 500; attempt++) {
zmq_poll (0, 0, 2);
rc = zmq_send (router, identity, 10, ZMQ_SNDMORE);
if (rc == -1 && errno == EHOSTUNREACH)
continue;
assert (rc == 10);
rc = zmq_send (router, "HELLO", 5, 0);
assert (rc == 5);
break;
}
uint8_t buffer [5];
rc = zmq_recv (dealer, buffer, 5, 0);
assert (rc == 5);
assert (memcmp (buffer, "HELLO", 5) == 0);
close_zero_linger (dealer);
}
zmq_close (router);
zmq_ctx_destroy (ctx1);
zmq_ctx_destroy (ctx2);
return 0;
}
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